1940 Buick speedometer question

[Century Eight]

My car is in the shop and I have gotten fuzzy on what the indicator light does on the 110 mph speedometer at the top between the 50 and 60 marks.  What does this indicate? My mechanic is working on the wiring and I don’t know if I ever knew its purpose so i cant tell him what it is, nor do any of the books I have, show it.   At the bottom of the gauge there are words that say bright lights so that must not be it, unless it lights up in addition to the words “bright lights”.  It is some sort of idiot light but I cant tell him because it don't remember or never saw it working.  Maybe the idiot light comes on when it knows I’m the one holding the steering wheel!

 

Anyway if you know, I would appreciate your response so he can get on to the next thing.

 

thanks , Phil

Edited March 23, 2022 by Century Eight (see edit history)

[Terry Stock]

 

Have a look at Morgan Wright's comment & images here:

https://forums.aaca.org/topic/151726-1941-buick-speedometer-removal/page/2/

 

I suspect it has the same function as the light above the 60 at the top of the 120 mph speedo.  The placement of the text "bright lights" seems a bit weird on the 110 mph.

[Century Eight]

Thanks Terry, the article was very informative.   Maybe the light on top and the words on the bottom are redundant.

[Daves1940Buick56S]

Yeah, they both light up with bright lights. I guess Buick wanted to be sure!

[Century Eight]

Thanks Dave, I’ll let him know